Abstract
The aim of this work was to develop a mathematical model to investigate the rheological characteristics of viscoelastic pulp-fibre composite materials. The rheological properties of High-Yield Pulp (HYP) reinforced bio-based Nylon 11 (Polyamide 11) (PA11) composite (HYP/PA11) were investigated using a capillary rheometer. Novel predicted multiphase rheological-model-based polymer, fibre, and interphasial phases were developed. Rheological characteristics of the compo-site components influence the development of resultant microstructures; this in turn affects mechanical characteristics of a multiphase composite. The main rheological characteristics of polymer materials are viscosity and shear rate. Experimental and theoretical test results of HYP/PA11 show a steep decrease in apparent viscosity with increasing shear rate, and this melt-flow characteristic corresponds to shear-thinning behavior in HYP/PA11. The non-linear mathematical model to predict the rheological behavior of HYP/PA11 was validated experimentally at 200°C and 5000 S-1 shear rate. Finally, predicted and experimental viscosity results were compared and found to be in a strong agreement.
Highlights
Pulp-fibre-reinforced thermoplastic composites are in high demand in the automobile, construction, and aero-How to cite this paper: Cherizol, R., Sain, M. and Tjong, J. (2015) Modeling the Rheological Characteristics of Flexible High-Yield Pulp-Fibre-Reinforced Bio-Based Nylon 11 Bio-Composite
The apparent viscosity as function of the steady-shear rate of high-yield pulp (HYP)/PA11 at 200 ̊C is shown in Figure 2
The experimental results showed that the apparent viscosity of HYP/PA11 composite decreases with increasing shear rate
Summary
Pulp-fibre-reinforced thermoplastic composites are in high demand in the automobile, construction, and aero-How to cite this paper: Cherizol, R., Sain, M. and Tjong, J. (2015) Modeling the Rheological Characteristics of Flexible High-Yield Pulp-Fibre-Reinforced Bio-Based Nylon 11 Bio-Composite. Pulp-fibre-reinforced thermoplastic composites are in high demand in the automobile, construction, and aero-. (2015) Modeling the Rheological Characteristics of Flexible High-Yield Pulp-Fibre-Reinforced Bio-Based Nylon 11 Bio-Composite. Other reasons for the high demand for the utilization of green fibres are their low density and good thermal and acoustic properties. The bleached high-yield pulp (HYP) fibres derived from hardwood that were used in this study are short crystalline fibres [4] [5]. Short-fibre-reinforced polymer composites are extensively used in manufacturing industries due to their light weight and improved mechanical properties [5]. HYP has been used for its low lignin content, and for its potential thermal stability and its strong adhesion when it is bonded with high-temperature engineering thermoplastic polymers [4]-[6]
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